$ location在AngularJS自定义指令中不起作用

时间:2019-01-04 09:57:33

标签: javascript angularjs angularjs-directive

我有如下自定义指令:

angular.module('app.directive').directive('myProductSwitcherDropdown',myProductSwitcherDropdown);

myProductSwitcherDropdown.$inject =  ['$compile'];
 function myProductSwitcherDropdown() {
    return {
        restrict: 'E',
        transclude: 'true',
        scope: {
          domainobject:"=",
          ctrlFn:"&"
        },
        templateUrl: "src/directive/templates/my-product-switcher-dropdown.html",

        controller: ['$scope', 'UtilService', function($scope,UtilService) {
            debugger;
            var self = this;
            $scope.instance =self;

            self.dropDownChanged = function(item) {
                debugger;
                $scope.ctrlFn();
            };


        }],
       controllerAs: 'myProductSwitcherDrpdwnCtrl'
  }
}

我正在这样调用指令:

<div class='notification-tray'></div>
<div class="left-menu pull-left">
  <my-product-switcher-dropdown domainobject="domainobject" ctrl-fn="ctrlFn()">
  </my-product-switcher-dropdown>
</div>

但是在我的控制器中,当我在ctrlFn()内尝试使用say $location or $window时,它的名称为 undefined

我也注射了这些东西。

angular.module('workspaces.domain').controller('DomainController',DomainController);
DomainController.$inject =  ['$scope', '$rootScope', '$location'];
    function DomainController ($scope, $rootScope, $location) {
        var self = this;
        ....
        ....

        //$location is accessible here though 

        $scope.ctrlFn = function () {
            //Undefined here
            debugger;
        };

ctrlFn() $location可以访问之前,但在内部却无法访问。 我在做什么错了?

1 个答案:

答案 0 :(得分:1)

这是开发者控制台的构件。内部代码需要引用$location,以便JavaScript引擎创建closure

angular.module('workspaces.domain').controller('DomainController',DomainController);
DomainController.$inject =  ['$scope', '$rootScope', '$location'];
    function DomainController ($scope, $rootScope, $location) {
        var self = this;
        ....
        ....

        //$location is accessible here though 

        $scope.ctrlFn = function () {
            //ADD reference to $location
            $location;
            //OR
            console.log($location);
            //Will also be defined here
            debugger;
        };

这两种方法都强制JavaScript引擎创建closure,这对于开发者控制台调试器是可见的。